#nav {
	clear: both;
	width: 913px;
	height: 100px;
	position: relative;
}

#nav #logo {
	display: inline-block;
	width: 180px;
	height: 100px;
	background: url(../img/logo.jpg);
}

#nav #ul_up {
	float: right;
	width: 733px;
	height: 100px;
	background: url(../img/head_bg.jpg) no-repeat;
	list-style: none;
}

#nav #ul_up .navTop {
	position: relative;
}

#nav #ul_list {
	width: 212px;
	background: #339933;
	list-style: none;
	position: absolute;
	left: 320px;
	top: 69px;
	z-index: 100000;
	display: none;
}

#nav #ul_list li {
	height: 36px;
	color: #ccc;
	border-bottom: 1px solid darkgreen;
	font-size: 12px;
	line-height: 36px;
	padding-left: 10px;
}

#nav #ul_up li {
	width: 140px;
	float: left;
	line-height: 100px;
	text-align: center;
	position: relative;
}

#nav li a {
	text-decoration: none;
	color: white;
}

#nav li a:hover {
	color: yellow;
}

#nav #ul_up li img {
	position: absolute;
	right: 0;
	top: 34px;
}

#nav #ul_up li:nth-child(5) {
	width: 173px;
	height: 100px;
	background: url(../img/menu-bg-last.gif) no-repeat;
	background-size: 173px 35px;
	background-position: 0 34px;
}
.title {
	color: #299e4e;
	font-size: 15px;
	font-weight: bold;
	margin: 10px 0;
}
.words {
	color: #666;
	font-size: 12px;
}
#about_us_content {
	width: 913px;
	margin: 0 auto;
	position: relative;
}

#about_us_content ul {
	width: 913px;
	height: 50px;
	border-bottom: 2px solid darkgrey;
	list-style: none;
}

#about_us_content ul li {
	margin-top: 15px;
	width: 100px;
	height: 20px;
	text-align: center;
	float: left;
	border-right: 1px solid green;
}

#about_us_content ul li a {
	text-decoration: none;
	color: rgb(161, 143, 0);
}

#about_us_content ul li a:hover {
	color: green;
}

.slider {
	width: 100px;
	height: 2px;
	background: darkgreen;
	position: absolute;
	left: 0;
	top: 50px;
}

.news_title {
	color: #299e4e;
	font-size: 16px;
	font-weight: bold;
	margin: 10px 0;
}

.problem_title {
	font-size: 14px;
	font-weight: bolder;
	color: #299e4e;
	margin: 5px 0;
}

#problem .words span {
	display: block;
}

#about_us_content #about_us .words {
	padding: 10px;
}

#about_us_content #promise .words {
	padding: 10px;
}

#about_us_content #problem .words {
	padding: 20px;
}

#about_us_content #big_event {
	display: none;
}

#about_us_content #big_event iframe {
	width: 913px;
	height: 375px;
	margin: 0 auto;
	border: 0;
	outline: none;
}